Deep Excavation Theory and Practice

ISBN-10: 0415403308
ISBN-13: 9780415403306
Edition: 2006
Authors: Chang-Yu Ou
List price: $243.00
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Description: The author deals with both the theoretical explication and practical applications of excavations in foundation engineering. Based on interaction between research results, analysis experience and teaching experience, the book is suitable for both  More...

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Book details

List price: $243.00
Copyright year: 2006
Publisher: Taylor & Francis Group
Publication date: 9/18/2006
Binding: Hardcover
Pages: 532
Size: 7.00" wide x 9.75" long x 1.50" tall
Weight: 2.442

The author deals with both the theoretical explication and practical applications of excavations in foundation engineering. Based on interaction between research results, analysis experience and teaching experience, the book is suitable for both teachers and engineers in advanced analysis and design.

Preface
Introduction to the analysis and design of excavations
Geological investigation and soil tests
Conditions of the adjacent properties
Confirmation of the conditions of an excavation site
Designing criteria
Collecting case histories of the nearby excavations
Auxiliary methods
Excavation analyses
Layout of the strutting system
Monitoring system
Protection of neighboring properties
Basic properties and mechanical characteristics of soils
Introduction
Basic properties
Specific gravity
Unit weight and water content
Atterberg limit
Permeability
Consolidation
Concept of effective stresses
Parameters of porewater pressure
Failure of soils
Mohr-Coulomb failure theory
Some commonly used laboratory shear strength tests
Triaxial test
Direct shear test
Direct simple shear test
Stress paths
Drained shear strength of soils
Undrained shear strength of saturated cohesive soils
Concepts of undrained shear strength
Characteristics of undrained shear strength
Methods to obtain undrained shear strength
Triaxial UU test
CU test
Field vane shear test
Cone penetration test
Other methods and empirical formulas
Relationship between shear strength, volume change, and porewater pressure
Undrained shear strength of unsaturated cohesive soils
Soil properties at the TNEC site
Summary and general comments
Excavation methods and lateral supporting systems
Introduction
Excavation methods
Full open cut methods
Braced excavation methods
Anchored excavation methods
Island excavation methods
Top-down construction methods
Zoned excavation methods
Retaining walls
Soldier piles
Sheet piles
Column piles
Diaphragm walls
Strutting systems
Selection of the retaining strut system
Case history of the TNEC excavation
Summary and general comments
Lateral earth pressure
Introduction
Lateral earth pressure at rest
Rankine's earth pressure theory
Coulomb's earth pressure theory
General discussion of various earth pressure theories
Displacement and earth pressure
Comparisons of Rankine's and Coulomb's earth pressure theories
Reliability of earth pressure theories and other solutions
Earth pressure for design
Cohesive soils
Cohesionless soils
Alternated layers
Sloping ground
Surcharge
Seepage
Earthquakes
Summary and general comments
Stability analysis
Introduction
Types of factors of safety
Overall shear failure
Free earth support method and fixed earth support method
Overall shear failure of strutted walls
Push-in
Basal heave
Bearing capacity method
Negative bearing capacity method
Slip circle method
Comparisons of the various analysis methods for basal heave failure
Applicability to sandy soils
Case study of overall shear failure
Overall shear failure of cantilever walls
Upheaval
Sand boiling
Mechanism and factors of safety
Case study
Summary and general comments
Stress and deformation analysis: simplified method
Introduction
Analysis of settlement induced by the construction of diaphragm walls
Characteristics of wall movement induced by excavation
Safety factors of stability
Excavation width
Excavation depth
Wall penetration depth
Wall stiffness
Strut stiffness
Strut spacing
Strut preload
Characteristics of ground movement induced by excavation
Shapes and types of ground surface settlement
Influence zones of settlement
Locations of the maximum settlement
Magnitude of the maximum settlement
Relationships between ground surface settlements and soil movements
Characteristics of excavation bottom movement induced by excavation
Time dependent movement
Analysis of wall deformations induced by excavation
Analysis of ground surface settlements induced by excavation
Peck's method
Bowles's method
Clough and O'Rourke's method
Ou and Hsieh's method
Comparison of the various analysis methods
Three-dimensional excavation behavior
Stress analysis
Struts-the apparent earth pressure method
Cantilevered walls-the simplified gross pressure method
Strutted walls-the assumed support method
Distribution of lateral earth pressure
Location of the assumed support
Computation procedure
Summary and general comments
Stress and deformation analysis: beam on elastic foundation method
Introduction
Basic principles
Formulation
Distribution of lateral earth pressures
Estimation of coefficient of subgrade reaction
Estimation of structural parameters
Analysis methods for excavations
Direct analysis and back analysis
Drained analysis, undrained analysis, and partially drained analysis
Computation of ground surface settlement
Limitations of the beam on elastic foundation method
Application of computer programs
Confirmation of the type of stress used in computer programs
Application of the computer program coded on the sole basis of the effective stress
Application of the computer program coded on the double basis of effective and total stresses
Confirmation of the type of earth pressure theory built into computer programs
Verification through case histories
Summary and general comments
Stress and deformation analysis: finite element method
Introduction
Basic principles
Plane strain elements
Bar elements
Beam elements
Interface elements
Stress-strain relationship and constitutive laws of soils
Elastic incremental model-the hyperbolic model
Linear elastic elastoplastic model
Cam-clay model and other high order models
Stress-strain relationship of structural materials and structural models
Determination of initial stresses
Direct input method
Gravity generation method
Modeling of an excavation process
Mesh generation
Shape of the element
Density of mesh
Boundary conditions
Excavation analysis method
Direct analysis and back analysis
Total stress analysis and effective stress analysis
Drained analysis, undrained analysis, and partially drained analysis
Coupled analysis
Plane strain analysis and three-dimensional analysis
Determination of soil parameters
Parameters for elastic deformation
Parameters for the hyperbolic model
Parameters for the linear elastic elastoplastic model
Parameters for the Cam-clay model and other high order models
Determination of structural parameters
Discussion of accuracy of analysis results
Summary and general comments
Dewatering of excavations
Introduction
Goals of dewatering
Methods of dewatering
Open sumps or ditches
Deep wells
Well points
Well theory
Confined aquifers
Full penetration wells
Partial penetration well
Free aquifers
Full penetration well
Partial penetration well
Group wells
Pumping tests
Step drawdown tests
Constant rate tests
Confined aquifers
Free aquifers
Dewatering plan for an excavation
Selection of dewatering methods
Determination of hydraulic parameters
Determination of the capacity of wells
Estimation of the number of wells
Computation of the influence range of drawdown
Dewatering and ground settlement
Summary and general comments
Design of retaining structural components
Introduction
Design methods and factors of safety
Retaining walls
Soldier piles
Sheet piles
Column piles
Diaphragm walls
Vertical main reinforcement
Horizontal main reinforcement
Shear reinforcement
Lap splice length and development length
Structural components in braced excavations
Strut systems
Horizontal struts
Stress computation
Allowable stress
Examination of combined stresses
End braces and corner braces
Wales
Center posts
Vertical bearing capacity
Pullout resistance
Structural components in anchored excavations
Anchor systems
Components of anchors
Analysis of anchor load
Arrangement of anchors
Design of anchor heads, anchor stands, and wales
Design of the free section
Design of the fixed section
Friction type of anchor
Underreamed anchors
Preloading
Design of retaining walls
Tests of anchors
Proving test
Suitability test
Acceptance test
Summary and general comments
Excavation and protection of adjacent buildings
Introduction
Allowable settlement of buildings
Allowable settlement under the building weight
Excavation-induced allowable settlement
Introduction to soil improvement methods
Chemical grouting method
Jet grouting method
Deep mixing method
Compaction grouting method
Building protection using the characteristics of excavation-induced deformation
Reduce the unsupported length of the retaining wall
Decrease the influence of creep
Take advantage of corner effect
Take advantage of the characteristics of ground settlement
Building protection by increasing stiffness of the retaining-strut system
Building protection by utilizing auxiliary methods
Ground improvement
Counterfort walls
Cross walls
Micro piles
Underpinning
Construction defects and remedial measures
Leakage through the retaining wall
Dewatering during excavation
Construction of the retaining wall
Pulling out the used piles
Over-excavation
Building rectification methods
Compaction grouting
Chemical grouting
Underpinning
Summary and general comments
Monitoring systems
Introduction
Elements of a monitoring system
Principles of strain gauges
Wire resistant type of strain gauges
Vibrating type of strain gauges
Measurement of movement and tilt
Lateral deformation of retaining walls and soils
Tilt of buildings
Ground settlement and building settlement
Heave of excavation bottoms
Measurement of stress and force
Strut load
Stress of the retaining wall
Earth pressure on the retaining wall
Measurement of water pressure and groundwater level
Water pressure
Groundwater level
Other measurement objects
Plan of monitoring systems
Application of monitoring systems
Summary and general comments
Conversion factors
Length
Area
Volume or section modulus
Moment of inertia
Mass
Density
Force or weight
Stress or pressure
Unit weight
Indices of the case histories: TNEC and buildings P, Q, R, and S
TNEC
Building P
Building Q
Building R
Building S
Commonly used steel sections or piles
H-steel (or W-section)
I-section
U-section sheet piles
Z-section sheet piles
Line-section sheet piles
Rail piles
Definition of plane strain
Answers to selected problems
References
Index

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